e911 - Cisco Knowledge Network

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					          Q&A Session for Cisco Knowledge Network: e911
          Date: July 23, 2008

Number                                  Question

  1       Why not VoIP enable the PSAP such to avoid all the gateways?

          What mechanisms are there for advising an end host of it’s
  2       location?

          You mentioned over 60 numbers globally to summons emergency
  3       help, how are we going to resolve this?

          for CUCM 6.x with mobility manager, there would be no necessary
          to have to keep Cisco Emergency Responder (CER) to support
  4       E911, is that correct?

          What type of circuit is required to support the connection to the PS-
  5       ALI Gateway?

          Can you list service providers for this gateway support? To the PS-
  6       ALI Gateway?

  7       did u say u cannot connect using a cama?

  8       Can you list some of the VPC companies?

  9       Are VPC services available now?

  10      was Emergency Responder included in that last slide?

          What type of circuit is required to support the connection to the PS-
  11      ALI Gateway?

       12 ALI d.b. maintained by customer onsite ?

       13 will there be more on the PS/ALI part?
        Are there companies/services we can use to just update our ALI
        records on the MSAG? Our carrier AT&T only provides updates
        through Intrado's Pinpoint (very expensive & duplicates CER
     14 functionality) or Centrex locator (limited to 28 characters)

15      How does PSAP find the actuall number of caller

        How does the VOIP provisioning center know the address of where
        the VOIP phone is? I understand that it knows the ANI, but how
        does it know the address, if the VoiP phone is at another address,
16      using Road Warrior.

17      Why can't they just use the real DID? whyANI it?

        Is VoIP Positioning Center housed locally or a service from the
        LEC? How does VPC handle calls with scattered enterprise
18      locations?

        can you show that example with the Person from Paris at a hotel in
19      chicogo - but now with IP

20      My local LEC says I need CAMA trunks direct to them. Is that true?

        Cisco has an elegant PS-ALI solution. Is that coming? All this is
21      NENA recommended standards

22      what psap's are IP enabled? do we have a list?

23      What type of trunk is required to the VPC from the cust prem

        Can E911 server support 2 separate clusters across the country ? or
24      does each cluster require own E911 server ?

        Is there a standard format for the data used by the PSAPs, and how
25      is the data transmitted to the PSAP?
     FYI- there are 6,000 PSAPs in the USA. Moving them all to native IP
26   is not possible

     with CM 6.1 there is a feature that allows you to change CSS based
27   on IP subnet. is there still a real need for CER?

28   could you throw some ligh on Intrado

     So, what can be done about "Global Road Warriors" using
29   softphone interfaces?

30   FYI- Verizon uses FTP for record transfer to the ALI database

31   we are using secureID directly to the LEC

     could you throw some light on Intrado and where it fits in the picture.
32   is it replacing PS ALI

     FYI- a PBX customer has choices- do PS-ALI themselves or hire a
33   third party provider

     How are Cisco 7920/7921 wireless phones / locations identified
34   within CER?

35   FYI- CAMA-MF trunks are used for PS-ALI and analog switches

36   FYI- PRI is the medium of choice

     For the redundancy purpose, is that good idea to always have a
37   POTS (FXO port) in case the PRI is dead?

38   has cisco been involved with any of these VOIP gway/service?

     with this new VoIP posistioning center can I just have one site with
39   PRIs and none at the other 10 sites?

40   Is CER a legal obligation for corporations?
        since CAMA doesn't support well the inboud call as Marc
        mentioned, so customer could not use CAMA as the backup line,
41      right?

        How does the CER know the callers physical location / address and
        how does this change, when the Road Warror goes to a new
     42 address?

        Is CER still required to automatically track IP phone location with the
        Device Mobility (not Mobility Manager) feature now available with
     43 Call Manager release 6?

        can we record the 911 call so security can hear it? or is that done
     44 with other services?

        can there be mor ER servers to provide redundency in the event of
     45 WAN failure?

     46 Does the SNMP have to RW or RO

     47 What happens to 911 calls if both CER servers are out of service?

     48 How often does CER go out and look for changes?

        can multiple locations as in diffrent states be configured on one
     49 CER?

     50 How do you track wifi phones? 7920/7921

        Does the CER need to be in the same common VLAN as all
     51 Enterprise LAN switches for CDP to work?

        Is there a way to only pull the CAM tables from the IP PHones, to
     52 look for communicators or softclients that might be behind them?

        are there going to be more than one "default" ERL's in future verions
     53 of CER?

     54 can multiple CM clusters be supported on a single CER cluster?
   Is subnet based ERLs, Cisco's best practice for use, in general - for
55 all phones?

   IP communicator that is behind a Cisco IP phone, such as in
   hoteling environments, cannot be seen, as described in the previous
56 slides.

   My whole campus tunnels back to my Wireless Lan Controllers at a
57 central location. How do I track the WiFi phones in that case?

58 is there a way to automate the transfer of data to the PS-ali?

   Normally to update the ALI database, who we should contact? Who
59 is the MSAG/PS-ALI?

60 What happens to 911 if CER's unavailable Both PUB and SUB ?

   Is there a recommended method for locating softclients that might
61 be in this situation?

   We have Cisco Call Manager 5.0 Will CM be able to communicate
62 with the Cisco ER Server?

63 minor release as in 6.0 vs. 6.1 or even further as in 6.1.1 vs. 6.1.2?

   What happens if a device/user does not have 911 capabilities in it's
64 CSS/Partition?

65 Does CER communicate directly to the PS-ALI vendor?

   How do you find out who to call at the LEC to find out the xfer
66 methods and process?

   In the case of a phone "moves" to a new switch, CER will validate
67 via SNMP at that time where the phone is located?

68 are the elins DID numbers

   Is subnet based ERLs, Cisco's best practice for use, in general - for
69 all phones?
70 You have to have CCM 6.1??

71 can I have several ELRN on one switch?

72 When do we expect support for 4506E and 4507RE switch models

   will you please re-review the callback? Also, can ONLY a PSAP use
73 this option, or is there now an open door for phones without DID?

   i thought it was CER that keeps track of what phone called 911 last
74 and what ELIN was assigned to it

   the digital phone move was described, but what about moving an
   analog phone that's plugged into a VG224 analog gateway, what
75 does that look like

   If we want to pin point 911 location information to be more specific,
   we have to use mulitple ELIN, which in turn, uses up a lot of DID
   numbers. Is there a different way to handle specific location as to
76 not used up 1000's of DID's?

77 Are you working on a VM or blade verision?

78 Can you touch on how CER works with SRST.

79 what is diff between roaming ip phones and ip phones?

80 Does Cisco have any resources on International Regulations?

81 I have V1.2(3A) is it upgradeable to V.2

   with the new feature in CM 6.1 that auto changes CSS why should I
82 use CER

83 what version of CCM does CER 2.0 support?

84 Does it work with a 4500 in the closet?
85 What's a "roaming" phone (for sizing) ?

86 every switch or switchport is assigned ERL or ELIN or both

   IS the Cisco ER product going to be shown at the APCO confernce
87 next month? If yes, what partner is showning it?

   for a mobile user with an IPC how long does it take for the CER db
88 and the ALI db to update for E911

   Lets say the switch is located at the corporate office, and the road
89 warrior is at a hotel, then what happens?

   The total number of phones in the server sizing slide accounts for
   30,000 ip phones, 10,000 analog phones, etc simultaneously or is it
90 30,000 ip phones or 10,000 analog phones?

   what is the best practice for wireless ip phones connected to non-
91 cisco WAPs that do not communicate with Cisco swithces?

   If we have 7921 Cisco wireless IP phones, does Cisco CER work for
92 these - and how?

93 Why ATA boxes cannot be automatically tracked?

94 What types of Switch protocols pass the location information

   Can "soft phones" installed on laptops be detected on a LAN NOT

96 I think it is illegal ot record 9-1-1 calls- medical reasons

   What happen if the primary CER and secondary CER fail on the
97 same time?

   On the reverse callflow, how does CM identify the inbound call as
98 coming from the emergency responder?
    Some localities requires floor and zone specific information to be
    sent with the call in larger buildings. Is there a way to configure
    some ports on a switch to report different zones (i.e. 1st floor, south
 99 on ports 1-24 and 1st floor north on ports 25-48

    CER only supports 1 CTI RP,is it in the road map to support multiple
    CTI RP and E911 number? Like we have a client with single CCM
    cluster across US and Mexica, how can we support it with single
100 cluster of CER?

101 When was 2.0 released?

     I do have an unrelated question - Currently I know and
    understand Avaya technology. I want to learn and work with the
    Cisco product, but don't currently work for a company who has
102 cisco. How can I best learn the Cisco IPT, so that

    So that I can be competitive in the marketplace. I do live in the
103 Northwest suburbs of Chicago. thank you.

104 Can you use DMA from 1.3 to 2.0(3)

    does CER 2.0 has isolated DRS for backup, or it can be backup
105 using CUCM DRS?

106 Can CER use Cisco Secure ACS to authenticate users?

    Can CER run as a coresident application onthe CUCM 6.1X server
107 or is it a separate machine altogether?

    If I have 3 Communication Manager Clusters - do I need 3 CER
108 clusters?

    I intercept all 911 calls and direct them to site security. I want to
    provide site security with phone location(s) before calling local
109 police. Is this possible

110 Is the CER APCO or NENA certified?

    is it good practice to have one ERL assisgned to every building. or
111 every floor should have a erl

    Does that onsite notification happen in parrallel to sending the 911
112 call to CO or before it places it to CO?

113 From what version to what version can we use DMA

114 Does CER integrate with IPICS in any way?
    How do we track WiFi phones across a coporate campus which
    uses LWAPP? Subnets are no longer location specific. Is
    something coming soon to tie the 2 technologies together? LWAPP
115 location manager is not really PEAP friendly.

116 Can CER V2.0 run on a Virtual server using static IP addressing ?

    do you have to subscribe to services from your local carrier to fully
117 utilize this product? (like AT&T's Pinpoint service)

118 How does the CER support Intrado?

    What would prevent my ER subscriber from taking over in the event
    of a ER primary failure? DBase repllication appears to be working
119 properly, etc.

120 how about CUWL used CER?

    How does CER define a user? is it on the basis of a DN or on basis
121 of physical phone and/or softphone?

123 In CER 1.3, is there a way to see how many licenses we have?

124 Is licencing set by individual phone - or by location?

125 Correct. A CER user is refered to Phones right?

126 When do we expect support for 3750E?

127 Can CER run on a VM server?

128 Can we add Standalone CER group to a new CER cluster

    if I have 100 phones in one location do I need 100 licenses or only
129 one

    So in the WLAN case you would have to create separate IPSubnets
130 for each remote WLAN?

131 CER looks great, but what are the caveats?
    will CER work correctly with analog Centrex lines at remote sites, or
    only with digital circuits like PRI? this may have been covered, but I
132 wanted to document the answer for certain

    What is the roundtrip delay limitation if the CER and CUCM are
    located across the WAN? Are the CER clusteing over the WAN
133 bound to this limitation?

    can you explain user licensing again? If I have 1000 users and a
    Pub/Sub CER model, what do I need and where are the Licenses
134 installed? Pub only?

    Are there plans to increase the RTD requirements to 80 ms RT to
135 match that of CUCM?

    will you be providing any other deployment considerations with
136 multiple WAN sites?

    does CER maintain a viewable listing of stations that called 911?
137 including stations, date, time

138 How much was the Starbucks giftcard?

    Are there any issues with separating the cluster, primary & backup
139 servers, over a WAN link?

140 Oh mt- it illegal in most states to intercept 9-1-1 calls- big liability

The PSAPs will eventually accept native VoIP calls. In the interim, the signaling and
media gateways are required to allow VoIP to progress. Remember, PSAPs are
government supported entities that adopt new technology at a different rate than
normal Enterprises.

The standards bodies have expanded DHCP and LLDP to include advising a host of
it's location during host configuration. An additional standard is being worked on that
allows a host to discover it's location using an application layer protocol, which should
be completed and released soon.

The IETF has taken the lead on this and suggested that we move to a uniform
resource name of 'SOS'. At this time, there seems to be general agreement globally
to use this. This doesn't mean that 9-1-1 will cease to work in the U.S., but this will
give you a mechanism that you can summons emergency help in any country by
'calling' URN SOS.

It depends on the organizations requirement. Location identification with device
mobility is determined based on the IP subnet - which could be used for a whole
building or even larger. Cisco Emergency Responder (CER) can track phones down to
the switchport level

It depends upon the local service provider. It could be a low-speed modem
connection, file transfer over the Internet, or a web-based interface.

Most service providers use the services of Intrado or TeleCommunication Systems
(TCS), which they resell to their PS-ALI customers

Your service provider will determine the type of interface. And yes,CAMA is capable
of supporting dynamic ANI.

Intrado and TeleCommunication Systems (TCS)


It depends upon the local service provider. It could be a low-speed modem
connection, file transfer over the Internet, or a web-based interface.

The customer usually maintains a local copy of the PS-ALI data provided to the local
service provider. Care must be taken to make sure these data remain consistent
between the customer and the service provider.

PS-ALI service is key to Cisco Emergency Responder (CER) operation, but CER uses
PS-ALI service for ELINs only, not for all station line numbers, so its much less
demanding to create and maintain the customer PS-ALI data
Only authorized service providers have access to the ALI data. Other than the
services available through the local service provider, there are services such as
Intrado's V9-1-1.

With Cisco Emergency Responder (CER) and using ELINs, the PSAP doesn't need to
know the actually number of the caller. If the PSAP needs to contact the caller after
the initial call is terminated, the PSAP can dial the ELIN and CER will forward the call
to the number the originated the initial 9-1-1 call. This will happen for a period of 3
hours after the initial call.

The VPC must be informed of the position of the phone, before or at the time a 911
call is placed. It uses the address or coordinates to determine the appropriate PSAP.

Cannot make timely updates to PS-ALI if DID is used. IP phones can be moved;
ERLs can't move, so ELINs fixed ELINs are used to identify them

VPC is not a LEC service, but a specialized service from Intrado, TCS or other
national emergency service provider.

I put this slide in as an example use case that *we* as the Industry need to solve.
Within the Industry and Standards Development Organizations, the emerging
architecture supports this use. All the protocols are not completed yet, but they are
getting close. Of course, once the architecture and protocols are done, it will take time
for product to be built and implementations to happen.

Your service provider will determine the trunk type needed based on the capabilities of
their service offering. CAMA is the most common for 9-1-1 traffic.

Standards call for the caller location (address or coordinates) to be included in call
setup signaling. Eventually, this will be supported by CPE and emergency service

There are a few jurisdictions that are using IP to transport 9-1-1 calls. I'm not aware if
either of these are accepting VoIP calls natively into their networks. Two states that
come to mind are Indiana and Vermont.

Usually a SIP trunk, but in some cases a TDM trunk may be supported.

One Cisco Emergency Responder (CER) server or group can support two or more
Cisco Unified Communications Manager clusters, but they must be the same minor
version. No CER server should be separated form any Cisco Unified Communications
Manager server by more than 40 msec RTT.

There are NENA standards, but each local service provider has their own variants.
Data may be transmitted over a low-speed modem connection, file transfer over the
Internet, or a web-based GUI, depending on what is supported by the local service
I agree this is a lofty goal. It would also be very sad if the PSAPs were the last entities
left on the legacy PSTN network.

This is usually enough to get to the right gateway but may not be specific enough for
emergency dispatch. Switch port location is more specific. Cisco Emergency
Responder (CER) also manages the PS-ALI data and ELIN replacement.

Intrado is the leading service provider managing ALI data for wireline service
providers. They also provide dynamic ALI data services for wireless service providers
and emergency call completion services for VoIP service providers and large

Current 'state of the art' is to provide a UI for road warriors to set their current location
prior to any emergency call.

This confirms my information

[is this part of the previous "question"?]

Intrado V9-1-1 service is an alternative that provides several advantages over
traditional PS-ALI services from the LEC. However, most customer will contine to use
traditional PS-ALI services.

Yes, they can use other vendors who integrate PS-ALI services with their product

Cisco Emergency Responder (CER) uses IP subnets to assign the location for
wireless IP phones.

Yes. CAMA was originally developed to transmit the billing number to a tandem

Certainly PRI is the more technically advanced than CAMA. But PRI is only possible if
the LEC allows dynamic ANI/CPN.


Cisco has provided equipment for these services but has not integrated with them.

You still need to have GWs capable of reaching all the right PSAPs for all the
customer sites -- so sites in the same local area can share access but not sites in
different states

E911 support obligation depends on the state and/or local jurisdiction. Customer must
decide whether to use Cisco Emergency Responder (CER) to meet their E911
CAMA is a one-way trunk. It normally terminates on the 9-1-1 Selective Router.
Hence, you will never receive any calls on the CAMA trunk, you will only send calls to
the 9-1-1 on it.

Cisco Emergency Responder (CER) uses the connected switch port or IP subnet,
which is mapped to a location by CER configuration data. Locations must be
adminsitratively configured in CER; there is at present no support for off-premises
users to configure their own locations

it depends on the organizations requirement. Location identification with device
mobility is determined based on the IP subnet - which could be used for a whole
building or even larger. Cisco Emergency Responder (CER) can track phones down to
the switchport level

Cisco Emergency Responder (CER) doesn't currently support emergency call

No more than 2 ER servers, pub and sub, can support one Cisco Unified
Communications Manager cluster

Read Only

Again - it depends on the Cisco Unified Communications Manager config - ifyou are
using Cisco Unified Communications Manager 6.x, then with site specific cll treatment,
you can get a narrower response. If previous versions of Cisco Unified
Communications Manager, then whatever is the CFNA/CFB config points to

it's configurable - between 5 and 30 minutes

yes, they can. remember to have them go out site specific gws tho'

using subnet based ERLs

No, Cisco Emergency Responder (CER) communicates with the switches via SNMP,
so normal IP communications is all that is required.

IPCommunicator has CDP enabled - not sure why you would want to do CAM table

There can't be more than one default ERL, but you can configure IP subnet as well as
switch-port based ERLs; the IP subnet based ERL will be used if no switch port ERL is

yes, so long as the Cisco Unified Communications Manager clusters are on the same
minor release of code
Switch port ERL are recommended for wired IP phones. They provide more specific
locations than IP subnet ERLs. However, IP subnet ERLs are recommended in
addition to switch port ERLs to provide backup for switch port ERLs as well as for
wireless IP phones and wired phone connected to unsupported switches.

Cisco Emergency Responder (CER) doesn't talk to switch in IP phone, so CDP
doesn't work directly, but switch table query can detect CIPC MAC at same port as IP
phone MAC and so knows phones are daisy-chained

Cisco Emergency Responder (CER) cannot be more specific than the IP subnets used
for wireless IP phones

depends on the provider - can be archaic like x-modem etc, some accept fax,email,
web uploads

your SP. MSAG - Master street Address Guide, PS-ALi -Private switch automatic
location information

The call received the failure treatment configured on Cisco Unified Communications
Manager For example, the call can be forwarded to the main security office.

This is supported by Cisco Emergency Responder (CER) using the switch table


Minor release mean 6.0 vs. 6.1. Maintenance release means 6.1.1 vs. 6.1.2.

Cisco Emergency Responder (CER) will attempt to discover all IP phones, regardless
of CSS/P. If Cisco Unified Communications Manager is not configured properly for
CER, then calls will receive whatever treatment results from Cisco Unified
Communications Manager configuration

no - you have to upload it from another device- you would not want to connect your
Cisco Emergency Responder (CER) server to the internet

LEC account teams for business services should be aware of their PS-ALI service


That is best as they are used for the PSAP to callback to the original caller.

depends on the granularity required by your business. Generally, tracking by subnet is
less granular than tracking by switchport'
no, older versions are also supported - willbe covered later

Yes, each switch port can be in it's own ERL.

Available now as a separate software download on Cisco.com

Cisco Emergency Responder (CER) 'forgets' the phone to ELIN mapping after 3
hours. So if the PSAP trys to contact the original caller 4 hours after the fact, the call
will *most likely* not get forwarded properly.

You are correct, Cisco Emergency Responder (CER) tracks what phones call 9-1-1

Analog phones can be tracked by manual line number configuration or the IP address
of the analog gateway. Manual line number configuration is more specific, but must
be updated if the phone is moved. Of course, moving an analog phone requires
configuration changes in Cisco Unified Communications Manager anyway.

This is a tough one, if you want to allow mobility of phones, the choice is to assign a
DID per location (ERL). You can use the actual phone number if the phones don't
move around.

Cisco Emergency Responder (CER) will follow Cisco Unified Communications
Manager's lead on virtualization

It doesn’t. SRST provides 911 call processing according to its own capabilities and

When an IP phone moves to a location supported by a different Cisco Emergency
Responder (CER) server or group than the one supporting the Cisco Unified
Communications Manager cluster to which the IP phone registers, that's a "roaming"
IP phone. The CER servers or groups share information about roaming IP phones.

I am not aware of International Regulations.

you will have to upgrade to version 1.3 and then to 2.0

This is usually enough to get to the right gateway but may not be specific enough for
emergency dispatch. Switch port location is more specific. Cisco Emergency
Responder (CER) also manages the PS-ALI data and ELIN replacement.

Cisco Emergency Responder (CER) 2.0(3) supports Cisco Unified Communications
Manager 4.1 through Cisco Unified Communications Manager 6.1, inclusive.

Yes. Supported switches are detailed in the release notes.
When an IP phone moves to a location supported by a different Cisco Emergency
Responder (CER) server or group than the one supporting the Cisco Unified
Communications Manager cluster to which the IP phone registers, that's a "roaming"
IP phone.

Yes, every switch/port must be assign an ERL. Each ERL has 1 or more ELINs

Not to my knowledge.

Cisco Emergency Responder (CER) does not need to perform a PS-ALI update for
IPC or any IP phone that relocates on premises. CER does not support off-premises

support for this is planned for a future release

It is 30,000 IP phones (using switch port locations or IP subnet locations) plus 10,000
analog phones (using manually configured locations)

Wireless IP phones can be tracked only by IP subnet locations, whatever they are
connected to.

Wireless IP phones can be tracked by IP subnet locations

ATAs can be tracked by IP subnet locations or manual configuration. They cannot be
tracked by switch port location.

Cisco Emergency Responder (CER) uses SNMP to get connected switch port
information from the switches

Yes. CIPC supports CDP and will appear as a CDP neighbor of a supported switch,
regardeless of VLAN.

It may be in some cases. There is no uniform national regulation, it can vary by state,
etc. Emergency call recording is supported by other vendors, but not Cisco
Emergency Responder (CER).

You would want to have a fallback in Cisco Unified Communications Manager, no
response from primary Cisco Emergency Responder (CER) try secondary CER, then
route to xxx-xxxx.

Just like the outbound 911 call, Cisco Unified Communications Manager has all the
ELINs flagged such that Cisco Unified Communications Manager will ask Cisco
Emergency Responder (CER) how to handle calls to the ELIN. Then, CER tracks the
actual phone that was assigned to that particular ELIN and instructs Cisco Unified
Communications Manager to forward accordingly.
Yes, each switch port can be in a different ERL, but remember, the more ERLs, the
more ELINs which are dedicated DID numbers.

There is no committed plan to change the Cisco Emergency Responder (CER)
deployment model.

Spring, 2007.

Cisco publishes lots of information on Cisco.com

[end of previous question]


Cisco Emergency Responder (CER) uses the same DMA as Cisco Unified
Communications Manager


Cisco Emergency Responder (CER) cannot be coresident.

No, Cisco Emergency Responder (CER) can handle multiple Cisco Unified
Communications Manager clusters with the caveat that the Cisco Unified
Communications Manager cluster are at the same version level.

Cisco Emergency Responder (CER) has on-site notification of all 911 calls via email,
smtp pagers, or webpage. You on-site security can see all 911 call activity, including
the ERL the call originated from.

No. Cisco Emergency Responder (CER) is not PSAP equipment and APCO/NENA
do not certify equipment of CER's type

NENA suggests at least one ERL per floor, but would like to see one ERL per 7000
square feet.

In parallel.

CCisco Emergency Responder (CER) ER 1.3 (Windows) to CER 2.0 (appliance)

No. CCisco Emergency Responder (CER) ER supports customer placing emergency
calls. IPICS supports those responding to emergency calls.
IP address is the only method that Cisco Emergency Responder (CER) currently
supports for tracking wireless IP phones.

No. CER requires a dedicated physical hardware server.

You have to subscribe to a PS-ALI service from your local service provider.

Cisco Emergency Responder (CER) does not yet support Intrado directly. CER works
with LEC-provided PS-ALI services, which are often provided to the LEC by Intrado.

Cisco Unified Communications Manager must be properly configured for emergency
calls to failover to the Cisco Emergency Responder (CER) subscriber if the publisher
is unavailable

There is no CUWL licensing for Cisco Emergency Responder (CER) CER must be
licensed separately and in addition to CUWL.

Any device capable of dialing 911. IP phones, IP softphones, analog phones, fax
machines with handsets, etc.

Cisco Emergency Responder (CER) must be licensed for every individual phone that
registers to Cisco Unified Communications Manager

A Cisco Emergency Responder (CER) "user" license covers a number of phones.

Already supported in Cisco Emergency Responder (CER) 2.0.

Cisco Emergency Responder (CER) is not supported on Vmware

A Cisco Emergency Responder (CER) group consists of a publisher and a subscriber.
A CER cluster consists of two or more groups. You can add another group to an
existing cluster.

You need a user license for 100 phones.


Cisco Emergency Responder (CER) tracks wireless IP phones by IP subnet only.
CER does not support clustering over the WAN to the same extent as Cisco Unified
Communications Manager. CER does not support off-premises users.
Cisco Emergency Responder (CER) works with analog CAMA and digital PRI trunks.
It does not work with FXO lines.

40 msec RTT and 1.5 Mbps available bandwidth between Cisco Emergency
Responder (CER) servers.

You need 2 server licenses, which include 2 user licenses for 100 phones each. You
need additional user licenses for 1800 phones

This is not a Cisco Emergency Responder (CER) limitation. Cisco Unified
Communications Manager does not currently support JTAPI applications across the
WAN with 80 msec RTT

Not at this time.

yes, extensive logging, viewable via authorized web browser

Hi Chris. $10. That should be good for maybe two cups? :)

At most 40 msec RTT and at least 1.5 Mbps are required

There are many variations and fine distinctions with regard to emergency call
recording, passive monitoring and actively conferencing in additional parties to a 911
call, depending on the customer environment and jurisdiction.

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